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Product details

Advanced Specifications
  • Front Speaker Size: 6.5”
  • Rear Speaker Size: 6x9”
  • Speaker Type: 2-way coaxial
  • Amplifier Power Output: 800W total (SounDigital EVOX platform)
  • Amplifier Channels: 4-channel
  • DSP Channels: 8-channel
  • Wiring Type: OFC (oxygen-free copper)
  • Signal Input: High-level (via LOC to DSP)
  • Integration Type: OEM head unit retained with DSP control
  • Saddlebag Lid Type: 6x9 adapter lids (Rushmore fitment)
  • Weather Resistance: Yes (speaker design)

*See document links below for full technical specifications.

Key Features
  • Full front and rear speaker system for increased output and coverage
  • DSP-controlled signal chain for precise tuning and system optimisation
  • 6x9 saddlebag speakers add midbass and overall system scale
  • System-matched components designed for predictable performance
  • Acoustic treatment improves clarity and reduces panel resonance across the bike
Compatible Touring Models
  • Street Glide models (2014–2023)
  • Street Glide Special models (2014–2023)
  • Ultra Limited models (2014–2023)
  • Ultra Classic models (2014–2023)
  • Electra Glide Standard models (2019–2023)
  • Road Glide models (2015–2023)
  • Road Glide Special models (2015–2023)
  • Road Glide Ultra models (2016–2023)
  • Road Glide Limited models (2020–2023)
Best Suited For
  • Riders wanting a complete front and rear audio system with higher output capability
  • Touring bikes used for highway riding where projection and coverage matter
  • Users prepared to tune and optimise a DSP-based system
  • Installers or experienced DIY users building a more advanced Harley setup
Why Choose OSCA Harley Kits

This kit moves beyond a basic upgrade into a properly structured Harley system, where front and rear speakers, amplification, and DSP work together as a cohesive signal chain rather than independent components. The addition of 6x9 saddlebag speakers significantly changes how the system performs on the road, adding scale and midbass presence, while the DSP allows the system to be tuned correctly instead of relying on factory processing. Like all OSCA Harley kits, it’s built around real system design focusing on how components integrate, how the signal is managed, and how the system performs once installed to deliver consistent, usable gains in output, balance, and control backed by real-world install experience.

Installation Notes
  • Requires modification to factory fairing speaker pods for front speaker fitment
  • Saddlebag lids must be replaced with included 6x9 adapter lids
  • OEM head unit retained but requires signal integration via LOC and DSP
  • DSP setup and tuning is required for correct system performance
  • Harley ECU flash tune required to correct factory EQ curve and increase signal voltage before DSP tuning
  • Dual wiring kits required to support amplifier current demands
  • Amplifier and DSP mounting solutions required depending on bike model
  • Acoustic treatment should be applied to fairing, speaker pods, and saddlebag lids
  • Professional installation and tuning strongly recommended
Load video:

Installation Guide

This video shows the general install process used across our Harley audio kits, including amp integration, speaker replacement, and wiring.

It’s provided as a guide only. These systems require experience with wiring and Harley fitment, so we don’t recommend attempting installation without the proper knowledge or skill level.

Music You Can Hear at 110km/h

Designed specifically for Harley-Davidson motorcycles, our audio upgrade packages are engineered to deliver clear, powerful sound at highway speeds. Tuned to cut through wind, exhaust, and road noise, each system balances output, clarity, and durability for real-world riding. Every package is purpose-built for the Harley platform, ensuring seamless integration, reliable performance, and music that stays present and controlled—whether cruising through town or riding hard at 110 km/h.

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IMPORTANT: Installation & Tuning Considerations

  • All systems require a flash tune of your Harley Davidson ECU to change the source radio output voltage and modify the internal EQ curve to the appropriate settings before installation. This is available as an optional extra from Old School Car Audio here in Perth, or your experienced Harley Dealer.
  • Warning - Amplifier gain settings need to be professionally set to protect speakers at higher power ratings.
  • Consider future proofing your system by installing the 4-channel amplifier version with the DSP, in case you want to upgrade to the 4-speaker kit in the future.
  • All DSP settings need to be measured and setup utilising a professional Real-Time Analyser (RTA). This is available here at Old School Car Audio in Perth, for the ultimate sound experience on your Harley.
  • Modifications to speaker pods are required to fit the GZCF 6.5SPL speakers.
  • Contact us for more specific information on your motorbike and a customised quotation.

Old School Car Audio Workshop

To ensure reliable set-up and accurate performance from our packages, professional installation and DSP tuning are strongly recommended. Our dedicated workshop in Perth specialises in high-performance motorcycle audio, ensuring precise fitment, safe amplifier setup, and accurate acoustic tuning. Speak with our team to discuss installation options tailored to your Harley.

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